Time & moneyAges 10-12

Working backwards from finish time

Count backwards in minutes from an activity’s finish time to find when it started. Review suitability for your learners before teaching.

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Age band:Ages 7-9 Ages 10-12

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Worksheet StudioPractice pack · Ages 10-12

Working backwards from finish time

Take your time. Show your thinking.

1. A countdown timer shows 1 minute and 20 seconds remaining. How many seconds is that in total?
1 m · 20 s · Working backwards from fin…
2. A countdown timer shows 6 minutes and 45 seconds remaining. How many seconds is that in total?
6 m · 45 s · Working backwards from fin…
3. A countdown timer shows 8 minutes and 35 seconds remaining. How many seconds is that in total?
8 m · 35 s · Working backwards from fin…
4. A countdown timer shows 1 minute and 15 seconds remaining. How many seconds is that in total?
1 m · 15 s · Working backwards from fin…
5. A countdown timer shows 14 minutes and 20 seconds remaining. How many seconds is that in total?
14 m · 20 s · Working backwards from fin…
6. A countdown timer shows 14 minutes and 50 seconds remaining. How many seconds is that in total?
14 m · 50 s · Working backwards from fin…
7. A countdown timer shows 8 minutes and 10 seconds remaining. How many seconds is that in total?
8 m · 10 s · Working backwards from fin…
8. A countdown timer shows 6 minutes and 15 seconds remaining. How many seconds is that in total?
6 m · 15 s · Working backwards from fin…
9. A countdown timer shows 11 minutes and 40 seconds remaining. How many seconds is that in total?
11 m · 40 s · Working backwards from fin…
10. A countdown timer shows 5 minutes and 5 seconds remaining. How many seconds is that in total?
5 m · 5 s · Working backwards from fin…
11. A countdown timer shows 6 minutes and 40 seconds remaining. How many seconds is that in total?
6 m · 40 s · Working backwards from fin…
12. A countdown timer shows 7 minutes and 20 seconds remaining. How many seconds is that in total?
7 m · 20 s · Working backwards from fin…

12 questions · Seed 42 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 10-12

Working backwards from finish time

Answers and reasoning. Review before teaching.

1. A countdown timer shows 1 minute and 20 seconds remaining. How many seconds is that in total?
80 seconds
1 × 60 = 60 seconds, plus 20 seconds = 80 seconds.
2. A countdown timer shows 6 minutes and 45 seconds remaining. How many seconds is that in total?
405 seconds
6 × 60 = 360 seconds, plus 45 seconds = 405 seconds.
3. A countdown timer shows 8 minutes and 35 seconds remaining. How many seconds is that in total?
515 seconds
8 × 60 = 480 seconds, plus 35 seconds = 515 seconds.
4. A countdown timer shows 1 minute and 15 seconds remaining. How many seconds is that in total?
75 seconds
1 × 60 = 60 seconds, plus 15 seconds = 75 seconds.
5. A countdown timer shows 14 minutes and 20 seconds remaining. How many seconds is that in total?
860 seconds
14 × 60 = 840 seconds, plus 20 seconds = 860 seconds.
6. A countdown timer shows 14 minutes and 50 seconds remaining. How many seconds is that in total?
890 seconds
14 × 60 = 840 seconds, plus 50 seconds = 890 seconds.
7. A countdown timer shows 8 minutes and 10 seconds remaining. How many seconds is that in total?
490 seconds
8 × 60 = 480 seconds, plus 10 seconds = 490 seconds.
8. A countdown timer shows 6 minutes and 15 seconds remaining. How many seconds is that in total?
375 seconds
6 × 60 = 360 seconds, plus 15 seconds = 375 seconds.
9. A countdown timer shows 11 minutes and 40 seconds remaining. How many seconds is that in total?
700 seconds
11 × 60 = 660 seconds, plus 40 seconds = 700 seconds.
10. A countdown timer shows 5 minutes and 5 seconds remaining. How many seconds is that in total?
305 seconds
5 × 60 = 300 seconds, plus 5 seconds = 305 seconds.
11. A countdown timer shows 6 minutes and 40 seconds remaining. How many seconds is that in total?
400 seconds
6 × 60 = 360 seconds, plus 40 seconds = 400 seconds.
12. A countdown timer shows 7 minutes and 20 seconds remaining. How many seconds is that in total?
440 seconds
7 × 60 = 420 seconds, plus 20 seconds = 440 seconds.

12 questions · Seed 42 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 10-12

Working backwards from finish time

Take your time. Show your thinking.

1. A countdown timer shows 1 minute and 20 seconds remaining. How many seconds is that in total?
1 m · 20 s · Working backwards from fin…
2. A countdown timer shows 6 minutes and 45 seconds remaining. How many seconds is that in total?
6 m · 45 s · Working backwards from fin…
3. A countdown timer shows 8 minutes and 35 seconds remaining. How many seconds is that in total?
8 m · 35 s · Working backwards from fin…
4. A countdown timer shows 1 minute and 15 seconds remaining. How many seconds is that in total?
1 m · 15 s · Working backwards from fin…
5. A countdown timer shows 14 minutes and 20 seconds remaining. How many seconds is that in total?
14 m · 20 s · Working backwards from fin…
6. A countdown timer shows 14 minutes and 50 seconds remaining. How many seconds is that in total?
14 m · 50 s · Working backwards from fin…
7. A countdown timer shows 8 minutes and 10 seconds remaining. How many seconds is that in total?
8 m · 10 s · Working backwards from fin…
8. A countdown timer shows 6 minutes and 15 seconds remaining. How many seconds is that in total?
6 m · 15 s · Working backwards from fin…
9. A countdown timer shows 11 minutes and 40 seconds remaining. How many seconds is that in total?
11 m · 40 s · Working backwards from fin…
10. A countdown timer shows 5 minutes and 5 seconds remaining. How many seconds is that in total?
5 m · 5 s · Working backwards from fin…
11. A countdown timer shows 6 minutes and 40 seconds remaining. How many seconds is that in total?
6 m · 40 s · Working backwards from fin…
12. A countdown timer shows 7 minutes and 20 seconds remaining. How many seconds is that in total?
7 m · 20 s · Working backwards from fin…

12 questions · Seed 42 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 10-12

Working backwards from finish time

Answers and reasoning. Review before teaching.

1. A countdown timer shows 1 minute and 20 seconds remaining. How many seconds is that in total?
80 seconds
1 × 60 = 60 seconds, plus 20 seconds = 80 seconds.
2. A countdown timer shows 6 minutes and 45 seconds remaining. How many seconds is that in total?
405 seconds
6 × 60 = 360 seconds, plus 45 seconds = 405 seconds.
3. A countdown timer shows 8 minutes and 35 seconds remaining. How many seconds is that in total?
515 seconds
8 × 60 = 480 seconds, plus 35 seconds = 515 seconds.
4. A countdown timer shows 1 minute and 15 seconds remaining. How many seconds is that in total?
75 seconds
1 × 60 = 60 seconds, plus 15 seconds = 75 seconds.
5. A countdown timer shows 14 minutes and 20 seconds remaining. How many seconds is that in total?
860 seconds
14 × 60 = 840 seconds, plus 20 seconds = 860 seconds.
6. A countdown timer shows 14 minutes and 50 seconds remaining. How many seconds is that in total?
890 seconds
14 × 60 = 840 seconds, plus 50 seconds = 890 seconds.
7. A countdown timer shows 8 minutes and 10 seconds remaining. How many seconds is that in total?
490 seconds
8 × 60 = 480 seconds, plus 10 seconds = 490 seconds.
8. A countdown timer shows 6 minutes and 15 seconds remaining. How many seconds is that in total?
375 seconds
6 × 60 = 360 seconds, plus 15 seconds = 375 seconds.
9. A countdown timer shows 11 minutes and 40 seconds remaining. How many seconds is that in total?
700 seconds
11 × 60 = 660 seconds, plus 40 seconds = 700 seconds.
10. A countdown timer shows 5 minutes and 5 seconds remaining. How many seconds is that in total?
305 seconds
5 × 60 = 300 seconds, plus 5 seconds = 305 seconds.
11. A countdown timer shows 6 minutes and 40 seconds remaining. How many seconds is that in total?
400 seconds
6 × 60 = 360 seconds, plus 40 seconds = 400 seconds.
12. A countdown timer shows 7 minutes and 20 seconds remaining. How many seconds is that in total?
440 seconds
7 × 60 = 420 seconds, plus 20 seconds = 440 seconds.

12 questions · Seed 42 · Age guidance, not curriculum certification